/*
 * Copyright 2018 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.samples.apps.iosched.ui

import androidx.hilt.lifecycle.ViewModelInject
import androidx.lifecycle.ViewModel
import androidx.lifecycle.liveData
import com.google.samples.apps.iosched.shared.domain.prefs.OnboardingCompletedUseCase
import com.google.samples.apps.iosched.shared.result.Event
import com.google.samples.apps.iosched.shared.result.data

/**
 * Logic for determining which screen to send users to on app launch.
 */
class LaunchViewModel @ViewModelInject constructor(
    onboardingCompletedUseCase: OnboardingCompletedUseCase
) : ViewModel() {
    val launchDestination = liveData {
        val result = onboardingCompletedUseCase(Unit)
        if (result.data == false) {
            emit(Event(LaunchDestination.ONBOARDING))
        } else {
            emit(Event(LaunchDestination.MAIN_ACTIVITY))
        }
    }
}

enum class LaunchDestination {
    ONBOARDING,
    MAIN_ACTIVITY
}
